Easier Account Migration and Better Account Identification

First of all, thank you for creating such a great authenticator extension! I really enjoy using it. It has a clean interface and is very convenient for managing my 2FA accounts.

I’d like to suggest a few feature improvements that would make it even more useful:

1. Batch import from otpauth:// URIs
   It would be extremely helpful to support importing multiple otpauth:// URIs at once. I was previously using another authenticator extension and had more than 100 accounts stored in it. Having to import them one by one would take a huge amount of time and make the migration process very tedious. Supporting batch import from otpauth:// URIs would make it much easier to migrate accounts from other authenticator apps or extensions.

2. Show the full Account Name on hover
   When using Compact view with a Small window size, account names may be automatically truncated. This can make it difficult to distinguish between multiple accounts under the same Service. It would be great if hovering over an account could display its full Account Name, for example via a tooltip.

3. QR Code and otpauth:// buttons
   It would be very useful to add a button to the action bar for displaying the QR Code of an account. Clicking it could open the corresponding QR Code image. Even better, there could also be a button to copy the account as an otpauth:// URI directly to the clipboard.

4. Export as plain-text otpauth:// URIs
   Please consider adding an export option that outputs accounts as plain-text otpauth:// URIs, with one URI per line. This would make backups and migration to other applications much easier.

5. Display service website icons
   It would also be great if the extension could automatically retrieve and display the website favicon for each Service at the beginning of the account entry. This would make accounts much easier to recognize at a glance.

Thanks again for the excellent extension and for considering these suggestions!